Project Questions about Programming and Electrical

[RyanN]

Originally Posted by Phalanx

Look in ifi_aliases.h, You will find the variables for the battery.
I hope this helps.

/*
*-----------------------------------------------------------------------------------------------------
*---------- Aliases for Battery Voltage bytes --------------------------------------------------------
*-----------------------------------------------------------------------------------------------------
* Formula to calculate voltage in volts:
* current_voltage = battery_voltage * 0.038 + 0.05;
*/

#define battery_voltage rxdata.rc_main_batt*15.64/256
#define backup_voltage rxdata.rc_backup_batt*15.64/256

I've gotten to the part of programming where I'm trying to get my charger working, but obviously there is something wrong with the code.
User_routines_fast.c

/*** DEFINE USER VARIABLES AND INITIALIZE THEM HERE ***/
int powerrelay;
int tempb;
int tempc;
int tempd;
int pwrofftmout;
int powerout;
int poweroutb;
int volts;
(Skip a lot of the stuff that doesn't matter in this post)
printf("volts %d\n","battery_voltage %d\n");
volts = battery_voltage*0.038+0.05; /*Should give the correct voltage*/

With my novice programming skills, all this seems good to me, however, when using the printf command (which I'm not sure I'm using it correctly) it says "volts 15865" meaning that it has no value for volts and when I manually convert: 15865*0.038+0.05 = 602.92V which is obviously not correct. Any help is greatly appreciated.

Also, the value 15865 does not change at all. It is constant when I disconnect the charger or when I put a load on the battery, which indicates something else is not working properly.